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820-2877-B missing PM_SLP_S4_L
I give up. This board is going to trash, I spent too much time on this one. I tried to reflow it, no luck. Thank you for your help!- Mirarty
- Post #9
- Forum: Macbook Logic Board Repair Questions
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820-2877-B missing PM_SLP_S4_L
Nothing on PM_SLP_S4_L (CH2) when triggering SMC_ONOFF_L (CH3)- Mirarty
- Post #7
- Forum: Macbook Logic Board Repair Questions
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820-2877-B missing PM_SLP_S4_L
With the magsafe disconnected the L6995 has fluctuating resistance to GND. It starts around 200k and increases over time. With magsafe connected it is 14M. RTC_RST_L - 3.39V SM_INTRUDER_L - 3.39V PM_RSMRST_L - 3.4V- Mirarty
- Post #5
- Forum: Macbook Logic Board Repair Questions
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820-2877-B missing PM_SLP_S4_L
PPBUS_G3H - 12.58V L7750 - 0.91V PM_SLP_S4_L stays low if I trigger R5015 I didn't find a good spot to probe PM_PWRBTN_L. This net is going only to U4900 and U1400 and both are BGA's. I'm using OpenBoardView and this SW doesn't shows vias so I can't probe this net on via either. I haven't...- Mirarty
- Post #3
- Forum: Macbook Logic Board Repair Questions
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820-2877-B missing PM_SLP_S4_L
Hi guys, I''m struggling with troubleshooting on 820-2877-B. No visible damage, everything looks clean. S5 rails are OK, but PM_SLP_S4_L is 0V Any suggestion what I can check or MCP is dead? Board doesn't power on and magsafe LED is dim. Thank you!- Mirarty
- Thread
- Replies: 8
- Forum: Macbook Logic Board Repair Questions